Grape seed extract is extracted from the seeds of Vitis vinifera L. and are the leftovers of wineries. After drying, they are separated into grape skins and grape stems. Grapeseeds are rich in amino acids, vitamins and minerals, and have health and beauty benefits.

Polyphenols
Grape seeds contain polyphenols, mainly catechins and procyanidins. The catechins include catechins, epicatechins, and their gallate esters, which are the main monomers in grape seeds and constitute the constituents of proanthocyanidin oligomers and polymers.
Fats and oils
Grape seeds are rich in oil and fat, accounting for about 12% to 15% of their weight [3]. The oil contains a lot of unsaturated fatty acids, and the content of linoleic acid is between 58% and 78%.
Volatile components
Grape seed also contains a small amount of volatile components. Most of these substances belong to alcohols, phenols, and terpenoids and all have high biological activity.
Other ingredients
In addition to the above substances, grape seeds contain crude protein, amino acids and vitamins A, E, D, K, P and trace elements such as calcium, zinc, iron, magnesium, copper, potassium, sodium, manganese. Cobalt.